Nexus One Gingerbread Android upgrade now available. No more Facebook sync for Nexus S.

This means both Google-branded phones will get the upgrade, but it’s the Nexus One will get the most benefit, leaping from Froyo (Android 2.2) to the new Gingerbread outfit.

The jump to Android 2.3 brings with it a darker, greener hue to your phone’s menus and background, which should be a boon for your battery life.

It will also mean the Nexus One will get a nice speed boost, which should take some of the pressure off its ageing processor.

The upgrade for the Nexus S solves some minor problems, including bug fixes, while that much-trumpeted NFC chip will now be able to ‘write’ to other devices. Before the update, the chip inside Google’s second phone was only able to ‘read’ from other devices, now it’ll be able to broadcast its own information. Great for contact exchanging, photo swaps and more.

Google found that those that synced their contacts with their Facebook account lost access to those contacts if they left and deleted their Facebook Account. Those data-hoarders.

You may have to wait around a bit to get hold of the upgrade. Although it will be sent to your phone over-the-air (OTA), the Google Nexus team tell us that it “may take a few weeks for OTA to complete.”